Same here! I found that killing the wi-fi, and auto rotation tabs, saves more battery life. Not to mention how periodically you have your mail sync'd to be checked on a regular throughout the day. If its a email account you rarely use, have it checked less often it the account settings options.

Nice tips... I just shut off wifi and reduce the screen brightness when Im inside. Ive also been told keeping it near the body (instead of in an exturnal pocket in a jacket) helps extend the battery life... any other tips or suggestions?